Fish Surveys
Metadata
| Number of fish surveys per location, habitat, and exposure | ||||||
|---|---|---|---|---|---|---|
| Exposure | Strata | # Sites | # Transects | # Reels | Surveyed distance (m) | |
| Fanna | ||||||
| Forereef | Leeward | 2 | 1 | 2 | 6 | 150 |
| Forereef | Windward | 2 | 5 | 10 | 30 | 750 |
| Total | — | — | 6 | 12 | 36 | 900 |
| Helen | ||||||
| Backreef | Lagoon | 1 | 1 | 2 | 6 | 150 |
| Patchreef | Lagoon | 2 | 3 | 6 | 18 | 450 |
| Forereef | Leeward | 2 | 6 | 12 | 36 | 900 |
| Forereef | Windward | 2 | 5 | 10 | 30 | 750 |
| Total | — | — | 15 | 30 | 90 | 2250 |
| Merir | ||||||
| Forereef | Leeward | 2 | 3 | 6 | 18 | 450 |
| Forereef | Windward | 2 | 4 | 8 | 24 | 600 |
| Total | — | — | 7 | 14 | 42 | 1050 |
| Pulo Anna | ||||||
| Forereef | Leeward | 2 | 2 | 4 | 12 | 300 |
| Forereef | Windward | 2 | 2 | 4 | 12 | 300 |
| Total | — | — | 4 | 8 | 24 | 600 |
| Sonsorol | ||||||
| Forereef | Leeward | 2 | 4 | 8 | 24 | 600 |
| Forereef | Windward | 2 | 3 | 6 | 18 | 450 |
| Total | — | — | 7 | 14 | 42 | 1050 |
| Tobi | ||||||
| Forereef | Leeward | 2 | 5 | 10 | 30 | 750 |
| Forereef | Windward | 2 | 1 | 2 | 6 | 150 |
| Total | — | — | 6 | 12 | 36 | 900 |
| Grand total | — | — | 45 | 90 | 270 | 6750 |
QA/QC
Taxa
Observations
Expedition Summary
| Average species richness, abundance, and biomass | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2)1 | Biomass (g/m2)1 | |
| By exposure | ||||||
| Lagoon | 4 | 8 | 24 | 67.88 | 8.04 (7.53) | 198.31 (66.52) |
| Leeward | 21 | 42 | 126 | 67.29 | 9.64 (6.72) | 567.37 (221.58) |
| Windward | 20 | 40 | 120 | 72.88 | 12.94 (8.39) | 753.30 (473.41) |
| By strata | ||||||
| Deep | 44 | 45 | 135 | 69.44 | 10.42 (7.46) | 696.17 (446.38) |
| Shallow | 44 | 45 | 135 | 70.20 | 11.51 (8.00) | 538.23 (290.19) |
| Overall | ||||||
| Total | 45 | 90 | 270 | 69.82 | 10.96 (7.71) | 617.20 (382.68) |
| 1 Standard deviation in parenthesis | ||||||
Location summary
| Average species richness, abundance, and biomass by location | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2) | Biomass (g/m2) | |
| Fanna | ||||||
| Deep | 6 | 6 | 18 | 77.50 | 13.76 | 637.42 |
| Shallow | 6 | 6 | 18 | 60.83 | 14.36 | 297.62 |
| Overall | — | 12 | 36 | 69 | 14 | 468 |
| Helen | ||||||
| Deep | 14 | 15 | 45 | 67.80 | 6.82 | 633.74 |
| Shallow | 14 | 15 | 45 | 74.87 | 9.73 | 601.14 |
| Overall | — | 30 | 90 | 71 | 8 | 617 |
| Merir | ||||||
| Deep | 7 | 7 | 21 | 67.57 | 6.33 | 730.30 |
| Shallow | 7 | 7 | 21 | 73.43 | 5.68 | 634.89 |
| Overall | — | 14 | 42 | 70 | 6 | 683 |
| Pulo Anna | ||||||
| Deep | 4 | 4 | 12 | 61.25 | 17.72 | 1203.83 |
| Shallow | 4 | 4 | 12 | 67.50 | 10.43 | 670.61 |
| Overall | — | 8 | 24 | 64 | 14 | 937 |
| Sonsorol | ||||||
| Deep | 7 | 7 | 21 | 72.57 | 17.38 | 493.91 |
| Shallow | 7 | 7 | 21 | 64.00 | 17.22 | 382.62 |
| Overall | — | 14 | 42 | 68 | 17 | 438 |
| Tobi | ||||||
| Deep | 6 | 6 | 18 | 69.50 | 7.87 | 768.69 |
| Shallow | 6 | 6 | 18 | 73.17 | 13.96 | 602.09 |
| Overall | — | 12 | 36 | 71 | 11 | 685 |
Analyses
Richness
| Results of Adonis model for univariate analysis of fish species richness | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| depth_strata | 1 | 17.187 | 0.001 | 0.134 | 0.721 |
| location | 5 | 700.063 | 0.061 | 1.095 | 0.391 |
| exposure | 1 | 865.000 | 0.075 | 6.763 | 0.016 |
| habitat | 1 | 17.074 | 0.001 | 0.133 | 0.720 |
| diver | 1 | 18.771 | 0.002 | 0.147 | 0.701 |
| Residual | 79 | 10104.930 | 0.877 | NA | NA |
| Total | 89 | 11527.156 | 1.000 | NA | NA |
Abundance
| Results of Adonis model for univariate analysis of fish abundance | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| depth_strata | 1 | 29.318 | 0.006 | 0.767 | 0.397 |
| location | 5 | 1245.230 | 0.235 | 6.515 | 0.001 |
| exposure | 1 | 229.449 | 0.043 | 6.003 | 0.021 |
| habitat | 1 | 2.019 | 0.000 | 0.053 | 0.821 |
| diver | 1 | 695.530 | 0.132 | 18.196 | 0.001 |
| Residual | 79 | 3019.706 | 0.571 | NA | NA |
| Total | 89 | 5289.048 | 1.000 | NA | NA |
Biomass
| Results of Adonis model for univariate analysis of fish biomass | |||||
|---|---|---|---|---|---|
| df | SumOfSqs | R2 | statistic | p.value | |
| diver | 1 | 117916.70 | 0.009 | 1.225 | 0.269 |
| depth_strata | 1 | 559337.70 | 0.043 | 5.812 | 0.012 |
| habitat | 1 | 10482.94 | 0.001 | 0.109 | 0.718 |
| exposure | 1 | 1172378.50 | 0.090 | 12.182 | 0.001 |
| location | 5 | 2491926.10 | 0.191 | 5.179 | 0.002 |
| Residual | 79 | 7602837.73 | 0.583 | NA | NA |
| Total | 89 | 13033627.90 | 1.000 | NA | NA |
By depth
By exposure
| Average species richness, abundance, and biomass by location and exposure | ||||||
|---|---|---|---|---|---|---|
| Sites | # Transects | # Reels | # Taxa | Abundance (ind/m2) | Biomass (g/m2) | |
| Fanna | ||||||
| Leeward | 1 | 2 | 6 | 69.50 | 10.40 | 615.14 |
| Windward | 5 | 10 | 30 | 69.10 | 14.79 | 437.99 |
| Helen | ||||||
| Lagoon | 4 | 8 | 24 | 67.88 | 8.04 | 198.31 |
| Leeward | 6 | 12 | 36 | 66.42 | 6.01 | 502.66 |
| Windward | 5 | 10 | 30 | 80.00 | 11.18 | 1090.49 |
| Merir | ||||||
| Leeward | 3 | 6 | 18 | 68.17 | 5.40 | 760.32 |
| Windward | 4 | 8 | 24 | 72.25 | 6.46 | 624.30 |
| Pulo Anna | ||||||
| Leeward | 2 | 4 | 12 | 62.00 | 13.51 | 578.92 |
| Windward | 2 | 4 | 12 | 66.75 | 14.64 | 1295.53 |
| Sonsorol | ||||||
| Leeward | 4 | 8 | 24 | 65.50 | 13.97 | 383.90 |
| Windward | 3 | 6 | 18 | 72.00 | 21.74 | 510.75 |
| Tobi | ||||||
| Leeward | 5 | 10 | 30 | 70.90 | 11.36 | 661.85 |
| Windward | 1 | 2 | 6 | 73.50 | 8.67 | 803.09 |
By family
By trophic group
By species
| Top 30 fish species with highest contribution to overall fish biomass | |||||||
|---|---|---|---|---|---|---|---|
| Trophic/Family | Taxon | Min length (cm) | Mean length (cm) | Max length (cm) | Frequency (% stations) | Abundance (ind/m2)1 | Biomass (g/m2)1 |
| Planktivore | |||||||
| Fusilier | Pterocaesio tile | 15.5 | 21.08 | 28.5 | 65.56 | 0.50 (4.59 %) | 65.69 (10.64 %) |
| Surgeonfish | Naso hexacanthus | 35.0 | 49.13 | 60.0 | 60.00 | 0.03 (0.30 %) | 56.37 (9.13 %) |
| Fusilier | Caesio teres | 12.0 | 22.88 | 32.5 | 48.89 | 0.16 (1.42 %) | 28.42 (4.61 %) |
| Snapper | Macolor macularis | 10.0 | 42.72 | 60.0 | 80.00 | 0.02 (0.17 %) | 27.83 (4.51 %) |
| Fusilier | Pterocaesio randalli | 16.0 | 19.23 | 25.0 | 24.44 | 0.22 (2.02 %) | 21.78 (3.53 %) |
| Fusilier | Caesio lunaris | 20.0 | 23.88 | 32.5 | 30.00 | 0.06 (0.58 %) | 21.54 (3.49 %) |
| Surgeonfish | Acanthurus thompsoni | 7.5 | 16.63 | 23.0 | 73.33 | 0.11 (1.04 %) | 12.37 (2.00 %) |
| Fusilier | Pterocaesio pisang | 9.5 | 14.12 | 17.5 | 21.11 | 0.30 (2.77 %) | 12.29 (1.99 %) |
| Surgeonfish | Naso vlamingii | 20.0 | 37.56 | 55.0 | 73.33 | 0.01 (0.13 %) | 11.27 (1.83 %) |
| Damselfish | Chromis ternatensis | 2.0 | 6.57 | 10.5 | 74.44 | 0.88 (7.98 %) | 10.64 (1.72 %) |
| Damselfish | Lepidozygus tapeinosoma | 4.0 | 7.26 | 10.5 | 25.56 | 1.27 (11.58 %) | 9.97 (1.62 %) |
| Surgeonfish | Naso annulatus | 50.0 | 62.26 | 76.5 | 22.22 | 0.00 (0.02 %) | 8.45 (1.37 %) |
| Fusilier | Pterocaesio tessellata | 14.0 | 19.20 | 25.0 | 15.56 | 0.07 (0.66 %) | 7.76 (1.26 %) |
| Damselfish | Pycnochromis margaritifer | 2.5 | 4.96 | 5.5 | 87.78 | 3.08 (28.13 %) | 7.36 (1.19 %) |
| Soldierfish | Myripristis berndti | 7.0 | 22.26 | 29.0 | 56.67 | 0.04 (0.34 %) | 7.21 (1.17 %) |
| Damselfish | Chromis xanthochira | 8.5 | 12.79 | 14.0 | 38.89 | 0.11 (0.98 %) | 7.20 (1.17 %) |
| Soldierfish | Myripristis kuntee | 13.0 | 16.52 | 21.0 | 63.33 | 0.06 (0.53 %) | 5.54 (0.90 %) |
| Damselfish | Chromis xanthura | 5.0 | 12.07 | 15.5 | 64.44 | 0.16 (1.43 %) | 4.90 (0.79 %) |
| Top-predator | |||||||
| Snapper | Lutjanus bohar | 8.0 | 40.42 | 80.0 | 68.89 | 0.01 (0.08 %) | 13.85 (2.24 %) |
| Jack | Caranx sexfasciatus | 52.5 | 56.25 | 62.5 | 4.44 | 0.00 (0.04 %) | 12.74 (2.06 %) |
| Jack | Elagatis bipinnulata | 30.0 | 56.34 | 67.5 | 13.33 | 0.01 (0.12 %) | 11.88 (1.93 %) |
| Jack | Caranx papuensis | 35.0 | 43.33 | 55.0 | 2.22 | 0.02 (0.15 %) | 10.92 (1.77 %) |
| Jack | Caranx melampygus | 22.0 | 44.12 | 85.0 | 44.44 | 0.00 (0.04 %) | 7.47 (1.21 %) |
| Jack | Caranx lugubris | 18.0 | 38.60 | 68.0 | 28.89 | 0.00 (0.04 %) | 5.37 (0.87 %) |
| Snapper | Lutjanus gibbus | 25.0 | 33.34 | 41.0 | 32.22 | 0.01 (0.10 %) | 5.15 (0.83 %) |
| Lower-carnivore | |||||||
| Wrasse | Cheilinus undulatus | 28.0 | 68.69 | 105.0 | 16.67 | 0.00 (0.01 %) | 6.93 (1.12 %) |
| Emperor | Monotaxis grandoculis | 5.0 | 34.34 | 55.0 | 48.89 | 0.00 (0.04 %) | 5.78 (0.94 %) |
| Herbivore | |||||||
| Parrotfish | Scarus rubroviolaceus | 6.0 | 39.78 | 65.0 | 54.44 | 0.01 (0.05 %) | 5.96 (0.97 %) |
| Parrotfish | Chlorurus microrhinos | 5.0 | 44.64 | 65.0 | 35.56 | 0.00 (0.03 %) | 5.05 (0.82 %) |
| Surgeonfish | Naso unicornis | 38.0 | 46.67 | 58.0 | 15.56 | 0.00 (0.02 %) | 4.98 (0.81 %) |
| 1 Percent contribution in parenthesis | |||||||